The humanitarian response to post-election violence is shifting from addressing immediate needs to preparing for more protracted displacement of populations. With the violence affecting agriculture and markets across Kenya, the U.N. OCHA reported concerns of reduced staple food output from northern Rift Valley Province, which may negatively affect food security through 2009. Emergency food assessments are currently underway. Many health facilities are closed due to displaced health staff and difficulties of delivering medical supplies. Overcrowded camps, lack of safe drinking water and food, poor sanitation facilities and waste management, and insufficient medical supplies are exacerbating public health risks for IDPs.